Nut-lock.



0. A. HBGKEL.

NUT LOOK.

, 1912. 1 ,09 3 ,050. Patented Apr. 14, 1914.

W A I OTTO A. HEGKEL, OF ST. LOUIS, MISSOURI.

NUT-LOCK.

1 '0 all whom it may concern 1 Be it known that I, OTTO A. Hnonnn, acitizen of the United States, and resident of St. Louis, Missouri, haveinvented certain new and useful Improvements in Nut-Locks, of which thefollowing is a specification.

This invention relates to improvements in nut locks and has for itsobject to provide one end of a bolt, with a left hand and a right handscrew-thread over which is applied nuts having internal screw-threadscorresponding to the thread over which the same is applied, one of saidnuts having fastening members whereby the nuts when properly applied arethoroughly locked and prevented from becoming loosened or unscrewed byvibration.

A further object is to provide a nut look so arranged as to bethoroughly secured and prevented from unscrewing by vibration but whichmay be removed by means of the ordinary wrenches used for applying andtightening the nuts.

Figure 1 is a vertical sectional view of my invention shown in positionas applied to fish plates and railroad rails. Fig. 2 is a detailsectional view showing the two nuts in a position ready to be appliedone to the other. Fig. 3 is a side elevation of the inner nut. Fig. 4:is a side elevation of the outer nut to which the locking device isattached.

In carrying out my invention I provide a suitable bolt 5 provided with aleft hand screw-threaded portion 6 and a right hand screw-threadedportion 7, the portion hav ing the right hand screw-threads being ofsmaller diameter than that portion provided with the left handscrew-threads so that the nut 8 provided with the left hand screwthreadscan be readily applied without in any manner interfering with the righthand screw-threads. This bolt as shown in Fig. 1 is applied to ordinaryrailway rails 9 as indicated, securing the adjoining ends of the railstogether by the use of the fish plates 10, but this nut lock can be usedfor any purpose for which such devices are desirable so as to avoid theloosening of operating parts and prevent the nuts and bolts from comingout of place.

The nut 8 as shown in this construction is provided with a shank 11having flattened or rectangular surfaces either of square, hexagon, oroctagon nut type so that a Wrench can be readily applied for thoroughlytightening the nut upon the bolt and Specification of Letters Patent.

Application filed February 10, 1912.

Patented Apr. 14, 1914. Serial No. 676,857.

against the object the bolt is supposed to support; radiating from thisshank is an enlarged portion 12 preferably of circular shape, its outerfront surface being beveled as indicated by the numeral 13 and the sameis provided with a recess 14 of larger diameter than the screw-threadedportion; the walls of the recess being somewhat curvilinear in form, thebase of said recess having a groove or depression 15 in which isdesigned to be seated the ends or looking points 16 of fastening devices17 carried by the outer nut 18; these fastening devices are preferablyconstructed of spring material 79 and are firmly and securely seated inthe nut and when brought in relative position the ends snugly fit intothe depression or recess 15 as clearly shown in Fig. 1, preventing theouter nut 18 from turning on the thread portion and becomingdisconnected from the inner nut. The outer nut to which these fasteningdevices are firmly attached is also provided with a shank 19 of asurface similar in construction to the shank 11 of the g0 inner nut soas to be easily applied by the use of a wrench; this nut also having anen larged circular portion 20 and suitably beveled as indicated by thenumeral 21, but opposite to that of the beveled surface 13 of 5 theinner nut, the position of the two bevels being such that when the nutsare applied the beveled surfaces will contact and register with eachother making an absolute leak proof connection thereby preventing wateror any foreign substance from passing in between the nuts and lodgingwithin the recess. The position of the locking devices when applying orremoving the nuts is clearly shown in Fig. 2; these devices being ofspring material and the curvilinear surface of the recess of the innernut has a tendency to permit the contact points of the fastening devicesto ride over the curvilinear surface and when in proper contact willlodge within the depression as shown in Fig. 1 frictionally holding theouter nut from jolting loose and on account of the left and right handscrew-threads it will be impossible for the nuts to become loosened andremoved by 5 means of the vibration or general wear upon the rail, butstill permitting the nuts to be additionally tightened in the event thebolts should stretch by the pounding of the carwheels over the joints inthe track and can 119 also be removed by means of a wrench first appliedto the outer nut and during such action the fastening devices willrelease themselves from their locked position within the recess and rideupon the curvilinear surface, and when released will assume theirstraight position on account of the spring material.

Having fully described my invention what I claim is:

l. A nut lock comprising a bolt a portion thereof being of smallerdiameter, the larger portion of the bolt provided with a left hand screwthread and the smaller portion with a right hand screw thread, a nutprovided with an internal left hand screw thread, its one face beveledand provided with an internal recess, a second nut having an internalright hand screw thread and provided with a beveled recess which is tocommunicate with the beveled projection of the first nut, and a pair offastening devices supported in the second nut, the free ends of thefastening device-s arranged to seat themselves in the recess of thefirst nut for firmly locking the nuts in position when tightly screwedtogether substantially as specified. 7

2. A device of the class described comprising a bolt having left andright hand screw threads, the right hand screw thread being of smallerdiameter than the left hand screw thread, a nut operating on the righthand screw thread, a nut operating on the left hand screw thread, thenut on the left hand screw thread having its one face tapered and agroove formed in its interior, the nut on the right hand screw threadhavingv an inclined recess to receive the tapered portion of the lefthand screw threaded nut and a pair of hook fastening devices firmly heldin the right hand screw threaded nut, the free ends arranged to beseated in the groove when the nuts are tightly screwed together,substantially as specified.

3. A device of the class described comprising a nut lock consisting of abolt, a pair of nuts, a right and left hand thread formed on said bolt,a nut operating on each of the threads, each of said nuts having atapered contacting surface and an internal frictional fastening deviceconnecting both nuts for preventing the two from turning simultaneouslyupon the bolt, substantially as specified.

In testimony whereof, I have signed my name to this specification, inpresence of two subscribing witnesses.

OTTO A. HEGKEL.

Witnesses ALFRED A. EIoKs, WALTER G. STEIN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. 0.

